Fuel burning apparatus



July 5, 1932- s. T. WARNER FUEL BURNING APPARATUS Filed May 13, 1927INVENTOR.

- V /m ORNEY Sf Patented July 5, 1932 UNITED STATES PATENT; OFFICESAMUEL '1. WARNER, OF NEW YORK, N. Y., ASSIGNOR TO PEABODY ENGINEERINGCOIQPOBATION, OF NEW YORK, N. Y A. CORPORATION OF NEW YORK rum. romaineAPPARATUS Application filed Kay 13,

My invention relates to fuel burning apparatus in which one object is toprovide a unit in which pulverized coal, oil or gas may be burnedseparately or in any desired combina- 5 tion without an change either inthe unit Fig. 1 is a vertical section of the unit attached to afurnacefront, certain parts being in elevation; and

Fig. 2 is a. front view with the details of' the various connectionsomitted.

Referring to the drawing, the numeral 1 designates a portion of afurnace wall hafing .an openin .2 therein constituting the throat of thecom ustion chamber. In carrying out my invention" to provide a unit bymeans of which three different fuels may be burned either separately orin any. combination, I employ a burner for pulverized fuel, another forliquid fuel, and the third for gaseous fuel. These burners are mountedand arranged as follows, with reference to each other and to thefurnace. Interposed between the furnace wall and an air register 3 is anannular gas box 4, formed of two pieces 5 and 6. These pieces aresecured together by bolts 8 and to the furnace front, by stud bolts 8.-With the pieces 5 and 6 secured asshown, there is provided between thema narrow annular slot 9 in the inner wall of the box. The, slot 9 is atan angle to the axis of the throat2 so that the gas delivered through avalved connecting pipe 10 will issue at high velocit in the form of aconverging cone and wi l penetrate the rotating column of air comingthrough the registerB, or the issuing pulverized fuel or atomized oil,if one or both are used with the gaseous fuel.

. register reference may be madetoU.S .Patent 1927. Serial No. 191,064.

No. 1,527,214. The back plate of the register is frusto-con'ical withits small'end toward the furnace, and with the inner wall of the gasbox, forms a contracted passage for the whirling body of air. The throat2 increases in diameter from the front to the rear thus providing apassage of increasing cross-sec= tional area for the fuel after it isprojected into the combustion air.

Coaxial with the'throat 2 and supported 1n an opening in the front plate3 of the air register is the horizontal extension 14 of a pulverizedfuel pipe. This burner is adapted to use pulverized fuel deliveredthrough pipe 14 froma unit pulverizer or by the central bin system withfeeders. The pulverized fuel is supplied with the proper volumetudinally in its bearings and carrying an atomizer 16 of any well knowntype, the oil burner and the system employed may be that described in U.S. Patent No. 1,628,424, to which reference may be made for a morecomplete description. The rear end of the burner barrel or sleeve 17screws into a fitting 17' which carries onemember of a detachablecoupling by means of which the oil burner is held in operative positionand by which it may be removed when desired, all as fully described insaid Patent No. 1,628,424, and also in U. S. Patent No. 1,523,079.

For the eflicient operation of .the several burners above described,theyare assembled as shown, that is, with the fixed gas box surrounding theopening into the furnace throat and with the pulverized fuel and oilburners back of the plane of the slot 9 of the gas box. I also providethe following attachments to the pulverized fuel and oil burners.Surrounding the fuelburner pipe 15 is a burner barrel or sleeve 17 onthe end of which is mounted a cone shaped spreader 18 which lattersurrounds the atomizer 16. The sleeve 17 extends exteriorly of the pipe14 and is held in adjusted position by a set screw 19. To impart awhirling or rotating movement to the pulverized fuel suspended in thecarrier air, a spiral plate 20 is mounted within the pipe 14. This lateis slidably mounted on the sleeve 17 and may be adjusted to any desiredposition by the attached handle 21 which latter is held in adjustedposition by set screw 21. The pulverized fuel as it is discharged intothe combustion chamber is spread intoa thin sheet or hollow cone by thespreader 18 surrounding the oil atomizer. Mounted upon the discharge endof the pulverized fuel burner is a diffuser 22, preferably formed withopenings for the passage of air therethrough. It may be adjustedlongitudinally of the pipe 14 by the attached handle 23 and held inadjusted position by set screw 28. The diffuser protects the pulverizedfuel, oil or gas flames from the high drafts of the furnace throat.

From the foregoing description, it will be seen that I provide apulverized fuel burner that is simple and easy to renew when parts areworn out. Also, that means are provided to give a whirling motion to thepulverized fuel and carrier air as the fuel is discharged from thefrusto-conical member of the burner in athin even stream into the throatof the furnace. The secondary air required for gases.

It will also be noted that in the present structure one standard airregister with regulating vanes is used to give the violent whirling orrotary motion of the air at the furnace throat, whether burningpulverized fuel, liquid fuel or gas, either together in any desiredcombination, or separately.

The three burners are installed intact as a unit. These can be used forcarrying the entire load with either pulverized fuel, oil or gas.

I claim:

1. In combination, a furnace having a wall" with an opening thereinconstituting the throat of the combustion chamber, a gas box and meansfor mounting the same about the entrance to said opening, an airregister secured to said box, said register having a front plate, a pipefor pulverized coal extending through and supported by said front plate,a liquid fuel atomizer'extending through and supported by said pipe,means for supplying liquid fuel to said atomizer, said parts being somounted as to ischarge the fuel either from the gas box or from theatomizer or the pulverized coal supply pipe into the combustion air atsubstantially the entrance to the furnace throat, and means for givingthe combustion air a whirling motion.

2. In combination, a furnace havin a wall with an opening thereinconstituting the throat of the combustion chamber, a gas box and meansfor mounting the same at the entrance to the throat, said box having anopening the walls of which are inclined to the axis of the box, an airregister secured to said box at the front thereof, the back plate ofsaid register and the inner wall of the gas box forming a contractedpassage for the air entering through the register, a pipe for deliveringpulverized coal passing through and supported upon the front plate ofsaid register, a liquid fuel atomizer passing through and supported uponthe coal supply pipe, means for supplying liquid fuel to said atomizer,a spreader mounted upon the inner end of said atomizer,-and a diffusermounted upon the inner end of the pulverized coal supply pipe, saidparts being so mounted as to discharge the fuel at substantially theentrance to the furnace throat.

3. In combination, a furnace having a wall with an opening thereinconstituting the throat of the combustion chamber, a gas box and means,for mounting the same about the entrance to said opening, an airregister and means for securing the same in position to deliversecondary air for combustion to the furnace, said register having afront plate with an opening therein, a pipe for delivering pulverizedcoal and carrier air supported in said plate opening and extendingthrough said register so as to terminate in proximity to the furnacethroat, and means for directing the discharged fuel into the combustionair at substantially the entrance to the furnace throat.

4. In combination, a furnace having a wall with an opening thereinconstituting the throat of the combustion chamber, a gas box and meansfor mounting the same about the entrance to said opening, an airregister and means for mounting the same in position to deliver air forcombustion to the furnace, said register having a front plate, a

, pipe for pulverized coal extending through and supported by said frontplate, a liquid;

fuel atomizer extending through and supported by said pipe, means forsupplying liquid fuel to said atomizer, said parts being so mounted asto discharge the fuel either from the gas box or from the atomizer orthe pulverized coal supply pipe into the combustion air at substantiallythe en trance to the furnace throat, and means for giving the combustionair a whirling motion.

5. In combination, a furnace having a wall with an opening thereinconstituting the throat of the combustion chamber, a gas box and meansfor mounting the same about the entrance to said opening, an airregister and means for mounting the same in position to deliver air forcombustion to the furnace, the back plate of said register and the innerwall of the gas box forming a contracted passage for the air enteringthrough the register, a pipe for delivering pulverized coal extendingthrough and supported upon the front plate of said register, a liquidfuel atomizer mounted within and supported by the coal supply pipe,means for supplying liquid fuel to said atomizer, a spreader mountedupon the inner end of said atomizer, and a diffuser mounted upon theinner end of the pulverized coal supply pipe, said parts being somounted asto discharge the fuel from either of said pipes or the gas boxat substantially the entrance to the furnace throat.

6. The structure of claim 5 wherein the difiuser is of greater diameterthan the spreader and is provided with openings.

7. The structure of claim 4 wherein means is provided in the pipe forthe pulverized coal for imparting a whirling movement to the pulverizedcoal as it leaves the pipe, said means being longitudinally adjustablein the pipe.

8. In combination with a furnace having a wall with an opening thereinconstituting the throat of the combustion chamber, an

' air register mounted in position to deliver a column of air throughthe throat into the combustion chamber, a gas box between the furnacewall and air register around said throat, conduits for deliveringpulverized fuel and vaporized fuel respectively, said gas box andconduits having discharge openings adjacent the front end of the throatand arranged so that fuel discharged from either of the conduits or thegas box will meet the column of air at substantially the entrance to thethroat.

Si ned at New York city, in the county of ew York and State of New York,this 6th day of May, A D. 1927.

SAMUEL T. WARNER.

